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EM MICROELECTRONIC-MARIN SA
A6300
High Efficiency Linear Power Supply with Power Surveillance and Time-out
Features
Supply voltage monitoring Highly accurate 5 V, 100 mA guaranteed output Low dropout voltage, typically 380 mV at 100 mA Low quiescent current, typically 100 A Standby mode, maximum current 310 A (with 100 A load on OUTPUT) Unregulated DC input can withstand -20 V reverse battery and + 60 V power transients Fully operational for unregulated DC input voltage up to 26 V and regulated output voltage down to 1 V Reset output guaranteed for regulated output voltage down to 1 V No reverse output current Very low temperature coefficient for the regulated output Current limiting Clear microprocessor restart after power up Push-pull or Open drain output -40 to +85 C temperature range DIP8 and SO8 packages
Typical Operating Configuration
For Open drain version:
Unregulated Voltage
Regulated Voltage
INPUT OUTPUT
5V
A6300
RES V SS VSS Fig. 1
Description
The A6300 offers a high level of integration by combining voltage regulation and voltage monitoring. The voltage regulator has a low dropout ( typ. 380 mV at 100 mA ) and a low quiescent current (100 A). The quiescent current increases only slightly in dropout prolonging battery life. Built-in protection includes a positive transient absorber for up to 60 V (load dump) and the ability to survive an unregulated input voltage of -20 V (reverse battery). The INPUT may be connected to ground or a reverse voltage without reverse current flow from the OUTPUT to the INPUT. Upon the OUTPUT voltage rising above VTH, the reset output, whether RES or RES, will remain active (RES = 1, RES = 0) for an additional time of 50 ms. This allows the system voltage and the oscillator of the microprocessor to stabilize before they becomes fully active. When VOUTPUT falls below VTH, the reset output goes active. Threshold voltage can be obtained in different versions: 2 V, 2.4 V, 2.8 V, 3.5 V, 4 V.
Pin Assignment
DIP8/ SO8
RES or RES VSS N.C. N.C. A6300
N.C. OUTPUT INPUT N.C.
Applications
White / brown goods Industrial electronics Automotive electronics Cellular telephones Security systems Battery powered products High efficiency linear power supplies
Fig. 2
1
A6300
Absolute Maximum Ratings
Parameter Continuous voltage at INPUT to VSS Transients on INPUT for t < 100 ms and duty cycle 1% Reverse supply voltage on INPUT Max. voltage at any signal pin Min. voltage at any signal pin Storage temperature Electrostatic discharge max. to MIL-STD-883C method 3015 Max. soldering conditions Symbol VINPUT VTRANS VREV VMAX VMIN TSTO VSmax TSmax Conditions - 0.3 to + 30 V up to + 60 V - 20 V OUTPUT + 0.3 V VSS - 0.3 V - 65 to + 150 C 1000 V 250 C x 10 s
Operating Conditions
Parameter Operating junction temperature 1) INPUT voltage 2) OUTPUT voltage 2)3) Reset output guaranteed OUTPUT current 4) Thermal resistance from junction to ambient 5) - DIP8 - SO8 Symbol Min. Typ. Max. Units TJ VINPUT VOUTPUT VOUTPUT IOUTPUT -40 2.3 1.0 1.0 +125 26 C V V V mA
100
Rth(j-a) Rth(j-a)
105 160
C/W C/W
Table 2
1)
Table 1 Stresses above these listed maximum ratings may cause permanent damage to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction.
Handling Procedures
This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the supply voltage range. Unused inputs must always be tied to a defined logic voltage level.
The maximum operating temperature is confirmed by sampling at initial device qualification. In production, all devices are tested at + 85 C. 2) Full operation quaranteed. To achieve the load regulation specified in Table 3 a 22 F capacitor or greater is required on the INPUT, see Fig. 6. The 22 F must have an effective resistance 5 and a resonant frequency above 500 kHz. 3) A 10 F load capacitor and a 100 nF decoupling capacitor are required on the regulator OUTPUT for stability. The 10 F must have an effective series resistance of 5 and a resonant frequency above 500 kHz. 4) The OUTPUT current will not apply for all possible combinations of input voltage and output current. Combinations that would require the A6300 to work above the maximum junction temperature (+125 C ) must be avoided. 5) The thermal resistance specified assumes the package is soldered to a PCB.
2
A6300
Electrical Characteristics
VINPUT = 6.0 V, CL = 10 F + 100 nF, CINPUT = 22 F, TJ = -40 to +85 C, unless otherwise specified
Parameter Supply current Supply current 1) Output voltage Output voltage Output voltage temperature coefficient 2) Line regulation 3) Load regulation 3) Dropout voltage 4) Dropout voltage 4) Dropout voltage 4) Dropout supply current Thermal regulation 5) Current limit OUTPUT noise, 10Hz to 100 kHz Threshold voltage
Symbol ISS ISS VOUTPUT VOUTPUT Vth(coeff) VLINE VL VDROPOUT VDROPOUT VDROPOUT ISS Vthr ILmax VNOISE VTH VTH VTH VTH VTH VHYS VOL VOL VOL VOH VOH VOH ILEAK
Test Conditions Reset output open, IL = 100 A Reset output open, IL = 100 mA at VINPUT = 8.0 V IL = 100 A 100 A IL 100 mA, -40 C TJ +125 C 6 V VINPUT 26 V, IL = 1 mA, TJ = +125 C 100 A IL 100 mA IL = 100 A IL = 100 mA IL = 100 mA, -40 C TJ +125 C VINPUT = 4.5 V, IL = 100 A 8) TJ = +25 C, IL = 50 mA, VINPUT = 26 V, T = 10 ms OUTPUT tied to VSS Version: AA, AG, AM Version: AB, AH, AN Version: AC, AI, AO Version: AD, AJ, AP Version: AE, AK, AQ VOUTPUT = 5 V, IOL = 8 mA VOUTPUT = 3 V, IOL = 4 mA VOUTPUT = 1 V, IOL = 50 A VOUTPUT = 5 V, IOH =- 8 mA VOUTPUT = 3 V, IOH = -4 mA VOUTPUT = 1 V, IOH = -100 A VOUTPUT = 5 V
Min.
Min. 25C
Typ. 100 1.7
Max. 25C
Max. 310 4.2 5.12 5.15
Unit A mA V V
4.88 4.85 50 0.2 0.2 40 380 1.2 0.05 450 1.77 2.09 2.48 3.11 3.55 1.84 2.18 2.59 3.23 3.70 200 1.95 2.32 2.73 3.42 3.88 25 175 140 20 4.5 2.6 950 0.05 2.04 2.41 2.86 3.59 4.08
180 ppm/C 0.5 0.6 170 650 1.6 0.25 % % mV mV mV mA %/W mA Vrms V V V V V mV mV mV mV V V mV A
2.17 2.55 3.03 3.80 4.32 400 300 90
Threshold hysteresis RES Output Low Level RES Output High Level 7) Leakage current 6)
4.3 2.3 850
1
Table 3
1)
2) 3)
4) 5)
6) 7) 8)
If INPUT is connected to VSS , no reverse current will flow from the OUTPUT to the INPUT, however the supply current specified will be sank by the OUTPUT to supply the A6300. The OUTPUT voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Regulation is measured at constant junction temperature using pulse testing with a low duty cycle. Changes in OUTPUT voltage due to heating effects are covered in the specification for thermal regulation. The dropout voltage is defined as the INPUT to OUTPUT differential, measured with the input voltage equal to 5.0 V. Thermal regulation is defined as the change in OUTPUT voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Only for open drain versions. For push-pull output only Reset output open
3
A6300
Timing Characteristics
V OUTPUT = 5.0 V, CL = 10 F + 100 nF, CINPUT = 22 F, TJ = -40 to + 85 C, unless otherwise specified
Parameter Power-on Reset time Sensitivity 1) Propagation time 1)
1)
Symbol Test Conditions tPOR tSEN tR VOUTPUT = 5 V to 3 V in 5 s VOUTPUT = 5 V to 3 V in 5 s
Min. 25 20 22
Typ. 50 0.8*tR 75
Max. 75 200
Units ms
s s
Tested on version with VTH higher than 3 V
Table 4
Timing Waveforms
Voltage Monitoring
VOUTPUT VTH
tSEN
1V Logic"1"
Logic"0" Logic"1"
tPOR tR tPOR
t RES t RES t Fig.3
Logic"0"
Block Diagram
INPUT
Voltage Regulator Voltage Voltage Reference
OUTPUT
Reference
VIN
Reset Logic Timer
RES or RES
Oscillator
VSS Fig. 4
4
A6300
Pin Description
Pin 1 2 3 4 5 6 7 8 Name
RES or RES VSS N.C. N.C. N.C. INPUT OUTPUT N.C.
Function Reset output Supply ground Not connected Not connected Not connected Unregulated positive supply Regulated output Not connected Table 5
The A6300 will remain stable and in regulation with no external load and the dropout voltage is typically constant as the input voltage fall to below its minimum level (see Table 2). These features are especially important in CMOS RAM keep-alive applications.
Voltage Monitoring
The power-on reset and the power-down reset are generated internally with a voltage comparison of the voltage reference and the resistor divider (see Fig.4). At power-up the reset output (RES) is held low (see Fig. 3). After OUTPUT reaches V TH, the RES output is held low for an additional power-on-reset (POR) delay tPOR (typically 50 ms ).The power-on reset delay prevents repeated toggling of RES even if VOUTPUT and the INPUT voltage drops out and recovers. The POR delay allows the microprocessor's crystal oscillator time to stabilize and to ensure correct recognition of the reset signal to the microprocessor. The RES output goes active low generating the powerdown reset whenever VOUTPUT falls below VTH. The sensitivity or reaction time of the internal comparator to the voltage level on VIN is typically 70 s.
Functional Description
Voltage Regulator
The A6300 has a 5 V 2%, 100 mA, low dropout voltage regulator. The low supply current (typ.100 A) makes the A6300 particularly suited to automotive systems then remain energized 24 hours a day. The input voltage range is 2.3 V to 26 V for operation and the input protection includes both reverse battery ( 20 V below ground) and load dump (positive transients up to 60 V). There is no reverse current flow from the OUTPUT to the INPUT when the INPUT equals VSS .This feature is important for systems which need to implement (with capacitance) a minimum power supply hold-up time in the event of power failure. To achieve good load regulation a 22 F capacitor (or greater ) is needed on the INPUT (see Fig. 5). Tantalum or aluminium electrolytics are adequate for the 22 F capacitor; film types will work but are relatively expensive. Many aluminium electrolytics have electrolytes that freeze at about -30 C, so tantalums are recommended for operation below -25 C. The important parameters of the 22 F capacitor are an effective series resistance of 5 and a resonant frequency above 500 kHz. A 10 F capacitor (or greater) and a 100 nF capacitor are required on the OUTPUT to prevent oscillations due to instability. The specification of the 10 F capacitor is as per the 22 F capacitor on the INPUT (see previous paragraph).
Temperature Consideration
Care must be taken not to exceed the maximum junction temperature (+ 125 C). The power dissipation within the A6300 is given by the formula: TTOTAL = (VINPUT - VOUTPUT) * IOUTPUT + (VINPUT) * ISS The maximum continuous power dissipation at a given temperature can be calculated using the formula: Pmax = ( 125 C - TA) / Rth(j-a) where Rth(j-a) is the termal resistance from the junction to the ambient and is specified in Table 2. Note the Rth(j-a) given in Table 2 assumes that the package is soldered to a PCB. The above formula for maximum power dissipation assumes a constant load(i.e. 100 s). The transient thermal resistance for a single pulse is much lower than the continuous value. For example the A6300 in DIP8 package will have an effective thermal resistance from the junction to the ambient of about 10 C/W for a single 100 ms pulse.
5
A6300
OUTPUT Current versus INPUT Voltage
SO8 package soldered to PC board
TJmax = +125 C
100 80 OUTPUT current [mA]
60
TA=+50C
TA=+25 C
40 TA=+85 C 20 0 0 5 10 15 20 25 30 Fig.5 INPUT voltage [V]
Typical Application
Open drain version:
Unregulated Voltage Regulated Voltage
INPUT OUTPUT
100 nF 10 F 100 k
5V
A6300
P
22 F
RES V SS
RES
VSS Fig. 6
6
A6300
Package Information
Dimensions of 8-Pin SOIC Package D C L H Dimensions in mm Min Nom Max A 1.35 1.63 1.75 A1 0.10 0.15 0.25 B 0.33 0.41 0.51 C 0.19 0.20 0.25 D 4.80 4.94 5.00 E 3.80 3.94 4.00 e 1.27 H 5.80 5.99 6.20 L 0.40 0.64 1.27 Fig. 7 E 0 - 8
A1 B
A
e
4
3
2
5
6
7
8
Dimensions of 8-Pin Plastic DIP Package
A1
A2
A C
L b3 b2 b e Dimensions in mm eA eB
4
3
2
1 E1 E
5
6
7
8
A A1 A2 b b2 b3 C
Min. Nom. Max. 5.33 0.38 2.92 3.30 4.95 0.35 0.45 0.56 1.14 1.52 1.78 0.76 0.99 1.14 0.20 0.25 0.35
D E E1 e eA eB L
Min. Nom. Max. 9.01 9.27 10.16 7.62 7.87 8.25 6.09 6.35 7.11 2.54 7.62 10.92 2.92 3.30 3.81
Fig. 8
7
A6300
Ordering Information
. Part Number: A6300 AQ SO8A
Threshold Voltage & Output Type
2.0V 2.4V 2.8V 3.5V 4.0V Push-pull, Reset active low AA* AB* AC* AD* AE* Push-pull, Reset active high AG* AH* AI* AJ* AK* Open drain, Reset active low AM* AN* AO* AP AQ Table 6 *= non stock item. Might be available on request and upon minimum order quantity (please contact EM Microelectronic).
Package & Delivery Form
SO8B = 8-pin SOIC, Tape & Reel SO8A = 8-pin SOIC, Stick DL8A = 8-pin plastic DIP, Stick
When ordering, please specify the complete Part Number without space between letters: e.g. A6300AQSO8A,
A6300APSO8B, etc
Part Number A6300%%SO8A A6300%%SO8B A6300%%DL8A Package Marking (first line) 6300%% 6300%% 6300%%
Where %% refers to the 2 letters for the threshold voltage in Table 6 (AP, AQ, etc.)..
EM Microelectronic-Marin SA cannot assume any responsibility for use of any circuitry described other than entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version.
8EM Microelectronic-Marin SA, CH - 2074 Marin, Switzerland, Tel. +41 - (0)32 75 55 111, Fax +41 - (0)32 75 55 403
(c) 2002 EM Microelectronic-Marin SA, 03/02, Rev. F/465

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